Method for obtaining clean gas via destructive distillation of coal
A clean gas and coal dry distillation technology, which is applied in special forms of dry distillation, combustible gas purification, combustible gas purification/transformation, etc., can solve problems such as polluting the environment and increasing water treatment costs, and achieve the effect of reducing costs
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Embodiment 1
[0032] This embodiment is used to illustrate the method for obtaining clean coal gas by dry distillation of coal provided by the present invention.
[0033] use figure 1 In the process shown, long-flame coal with a size of 25-80 mm (see Table 1 for relevant physical properties) is dry-distilled in a vertical furnace. The temperature at the bottom of the vertical furnace is 900 ° C. 100°C, the bottom pressure is 0.14MPa, and the top pressure is 0.11MPa. The raw coal gas with a pressure of 0.11MPa and a temperature of 100°C, that is, a mixed gas containing tar, is obtained. The composition of the raw coal gas except water is shown in Table 3. Water The content is 30% by weight of the total raw gas.
[0034] Then the raw coal gas is contacted with coal tar at a flow rate of 100 kg / h at a temperature of 180°C, a distillation range of 180-500°C, and a flow rate of 200 kg / h. After contacting for 100 seconds, the liquid phase product is the first liquid product Discharged from the ...
Embodiment 2
[0036] This embodiment is used to illustrate the method for obtaining clean coal gas by dry distillation of coal provided by the present invention.
[0037] use figure 1 In the process shown, long-flame coal with a size of 25-80mm (see Table 1 for relevant physical properties) is dry-distilled in a vertical furnace. The temperature at the bottom of the vertical furnace is 700°C. 160°C, the pressure at the bottom is 0.12MPa, and the pressure at the top is 0.106MPa, and the raw coal gas with a pressure of 0.108MPa and a temperature of 160°C is obtained. The composition of the raw coal gas except water is shown in Table 3. 0.05 times the weight of the total amount of the mixture.
[0038] Then this raw coal gas is contacted with coal tar whose temperature is 90° C., distillation range is 180-500° C., and flow rate is 100 kg / h with a flow rate of 100 kg / h. After contacting for 60 seconds, the liquid phase product is discharged from the bottom of the tower. The gas phase product ...
Embodiment 3
[0040] This embodiment is used to illustrate the method for obtaining clean coal gas by dry distillation of coal provided by the present invention.
[0041] use figure 1 In the process shown, long-flame coal with a size of 25-80mm (see Table 1 for relevant physical properties) is dry-distilled in a vertical furnace. The temperature at the bottom of the vertical furnace is 850°C. 180°C, the pressure at the bottom is 0.13MPa, and the pressure at the top is 0.102MPa, and the raw coal gas with a pressure of 0.102MPa and a temperature of 180°C is obtained. The composition of the raw coal gas except water is shown in Table 3, and the water content is the total amount of clean gas 0.1 times the weight.
[0042] Then this crude coal gas is contacted with coal tar that temperature is 100 DEG C, distillation range is 180-500 DEG C, flow rate is 100 kg / hour with the flow rate of 100 kg / hour, after contacting for 20 seconds, the liquid phase product is discharged from the bottom of the t...
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